content: /*
   * Copyright 2011-2016 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package ix;
  
  import org.junit.*;
  
  public class SourceQueuedIteratorTest {
  
      IxSourceQueuedIterator<Integer, Integer, Integer> it;
  
      @Before
      public void before() {
          it = new IxSourceQueuedIterator<Integer, Integer, Integer>(Ix.<Integer>empty().iterator()) {
  
              @Override
              protected boolean moveNext() {
                  return false;
              }
          };
      }
  
      @Test
      public void normal() {
          Assert.assertTrue(it.isEmpty());
          Assert.assertEquals(null, it.peek());
  
          it.offer(1);
  
          Assert.assertFalse(it.isEmpty());
  
          Assert.assertEquals(1, it.peek());
          Assert.assertEquals(1, it.poll());
          Assert.assertTrue(it.isEmpty());
          Assert.assertEquals(null, it.peek());
  
          Assert.assertNull(it.poll());
          Assert.assertTrue(it.isEmpty());
      }
  
      @Test(expected = NullPointerException.class)
      public void nullOffer() {
          it.offer(null);
      }
  
      @Test
      public void clear() {
          Assert.assertTrue(it.isEmpty());
  
          it.offer(1);
  
          Assert.assertFalse(it.isEmpty());
  
          it.clear();
  
          Assert.assertNull(it.poll());
          Assert.assertTrue(it.isEmpty());
      }
  
      @Test
      public void nullWraps() {
          Assert.assertSame(IxSourceQueuedIterator.NULL,  it.toObject(null));
      }
  
      @Test
      public void nullUnwraps() {
          Assert.assertNull(it.fromObject(IxSourceQueuedIterator.NULL));
      }
  
      @Test
      public void foreach() {
          final int[] count = { 0 };
          it.<Object>foreach(new IxConsumer2<Integer, Object>() {
              @Override
              public void accept(Integer a, Object b) {
                  count[0]++;
              }
          }, null);
  
          Assert.assertEquals(0, count[0]);
      }
  }
  